Pointing out the co-relation of freedom and voting rights

I was thinking about the issue of voting rights, and started wondering...with Republicans and RW libertarians always talking about freedom and liberty, why isn't the Left nailing them down on their hypocrisy on this issue? The Right is always talking about those things when it comes to things such as guns, paying less taxes, and so-called "religious freedom", but they obviously don't apply on other issues. And whenever I hear Democrats discuss the voting issue, they mainly just talk about the equality and fairness aspects of it, but I believe that there is also an argument to be made in terms of freedom. By gutting the Voting Rights Act and passing numerous ID laws, conservatives are making it more difficult for Americans to exercise our Constitutional rights and basic freedoms.
What do you think?